參數(shù)資料
型號(hào)： XR17V254IV-0A-EVB
廠商： Exar Corporation
文件頁(yè)數(shù)： 16/70頁(yè)
文件大小： 0K
描述： EVAL BOARD FOR XR17V254 144LQFP
標(biāo)準(zhǔn)包裝： 1
系列： *
XR17V254
23
REV. 1.0.1
66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
REGB [23:16] (default 0x00)
REGB register provides a control for simultaneous write to all 4 UARTs configuration register or individually.
This is very useful for device initialization in the power up and reset routines. Also, the register provides a
facility to interface to the non-volatile memory device such as a 93C46 EEPROM. In embedded applications,
the user can use this facility to store proprietary data in an external EEPROM.
1.6.9
Multi-Purpose Inputs and Outputs
The V254 provides 8 multi-purpose inputs/outputs MPIO[7:0] for general use. Each pin can be programmed to
be an input or output function. The input logic state can be set for normal or inverted level, and optionally set to
generate an interrupt. The outputs can be set to be normal HIGH or LOW state, or 3-state. Their functions and
definitions are programmed through 5 registers: MPIOINT, MPIOLVL, MPIO3T, MPIOINV and MPIOSEL. If all
8 pins are set for inputs, all 8 interrupts would be Or’ed together. The Or’ed interrupt is reported in the channel
0 UART interrupt status, see Interrupt Status Register. The pins may also be programmed to be outputs and to
the 3-state condition for signal sharing. The MPIO[0] pin can be programmed to show the Timer output. When
it is programmed to be the Timer output, all the above 5 registers lose control over the MPIO[0] pin. For details
1.6.10
MPIO REGISTER
Bit [7] represents MPIO7 pin and bit [0] represents MPIO0 pin. There are 5 registers that select, control and
monitor the 8 multipurpose inputs and outputs. Figure 9 shows the internal circuitry.
1.6.8
REGB Register
REGB[16](Read/Write)
LOW (default) write to each UART configuration registers individually.
HIGH enables simultaneous write to all 4 UARTs configuration register.
REGB[19:17]
Reserved
REGB[20] (Write-Only)
Control the EECK, clock, output (pin 116) on the EEPROM interface.
REGB[21] (Write-Only)
Control the EECS, chips select, output (pin 115) to the EEPROM device.
REGB[22] (Write-Only)
EEDI (pin 114) data input. Write data to the EEPROM device.
REGB[23] (Read-Only)
EEDO (pin 113) data output. Read data from the EEPROM device.
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參數(shù)描述
XR17V254IV-F 功能描述:UART 接口集成電路 66MHz Quad PCI UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17V258 制造商:EXAR 制造商全稱:EXAR 功能描述:66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
XR17V258_08 制造商:EXAR 制造商全稱:EXAR 功能描述:66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
XR17V258IV 功能描述:UART 接口集成電路 66MHz Octal PCI UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17V258IV-0A-EVB 功能描述:UART 接口集成電路 Supports V258 144 ld TQFP, PCI Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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